Multiple choice technology mainframe What is the Line command used to hide all the line in a Mainframes program Hide Dontshow X AC Reveal answer Fill a bubble to check yourself C Correct answer Explanation In TSO/ISPF, the X (eXclude) line command is used to hide all lines in a dataset. This hides lines from view without deleting them. 'Hide', 'Dontshow', and 'AC' are not valid line commands for excluding/hiding lines.